Burner for liquid fuel.



A. LAING.

BURNER FOR LIQUID FUEL. APLlcATloN 4Huil) ^ue.11. 1913.

.Llmwy vPatented. NQV. 16, 1915.

ANDREW LAING, OF NEW'CASTLE-UPON-TYNE. ENGLAND.

BURNER FOR LIQUID FUEL.

Application led August 11, 1913. Serial No. 784,258.

To ZZ 'zu/wml t may concern.'

Be it known that I, ANDREW ject of the King of Great Britain. residing in Newcastle-upon-Tyne, England, whose postoffice address is l5 Osbornevroad; Newcastleupon-Tyne, in the county of Northumber land, England,) have invented certain new and useful Improvements in Burners for Liquid Fuel, of which the following is a specification. l

This invention relates to liquid fuel burners for steamv boiler and other furnaces, of the kind whereinthe oil or other liquid fuel is sprayed or atomized by steam, the oil and steam being injected under pressure through two co-aXial nozzles both delivering to an annular space encircling the steam nozzle, the construction and relation of the `nozzles and the annular space being such and outwardly inclined that the oil is projected in an annular sheet into this space while the'steam is directed across the space preferably ina forwardly direction so as to impinge upon the sheet of oil (already more or less broken up by its passage through the oil nozzle) while still more or less confined within the annular space, the impact of the converging sheets or streams 4of oil and steam completing the spraying or atomizing of the oil which is delivered to the furnace in a diffused ring of mist or spray.

This invention consists in improved construction and arrangements of parts according to which the inner or steam nozzle is in the form of a ring of separate nozzles. The aperture of the oil .outlet or nozzle formed between the oute'r casing and the fiared end of the steam supply tube is of annular character and is preferably adjustable in the known manner by the longitudinal displacement of the steam supply tube by means of a hand-wheel at the rear of the burner.

The improved construction is more specifically described with reference to the accompanying drawings, wherein- Figure l is an elevation and Fig. 2 an end view .of a.burner embodying the present invention; Fig. 3 is a longitudinal section of the same; Fig. 4 is an elevation of part of the burner, and Fig. 5 an end view n of the same; Fig. 6 is a longitudinal seeparts in opposite directions from chamber Specification o-f Letters Patent.

LA1NG,a sub-. Venlargedscale as through the steam' inlet `with the body E in Fig.. 6. Figs. l to 8 being all on an compared with Figs. l to The burner comprises a tubular body portion A withinwhich is fitted a hollow spindle B So as to leave an annular'fuel space C between the spindle and the body into which space the fuel is delivered through the fuel inlet branch CO. Steam is admitted connection BO the interior of the hollow spindle Band passages D in the body of a valve F secured upon the front end of the hollow spindle to a chamber E formed between the forward end of the body portion of the valve F and a cap `II removably? attached to the front end of the valve. This cap also forms, in conjunction with the valve, the discharge orifices l through which the steam passes from the chamber t 'and by which it is directed more orless diagonally across an annular duct or space encirclingthe steam nozzle so as to impinge on the stream of oil issuing from'the fuel nozzle into vthe said space and break up the same vinto evcee'd-v mgly fine spray.

vAs shown more particularly in Figs. 6

and

Patented N ov. 16, 1915.

are preferably leccentrically disposed to impart a` swirling or gyratory motion to the issuing jets of steam..

The mouth,V of the body portion A of the burner is suitably beveled to form a seat G for the valve F the extent of the opening between which and the cooperating face of the valve can be adjusted'as desired, for eX- ample, as shown in F igs..1,' 2 and the val-ve and-cap may be movable relatively to the body portion'A by means of a hand wheel K which is screwed upon the rear end of the tubular spindle B and is so' coupled portion as to slide the tubu- With valve and cap longitudilar spindle B to the body portion A and nallyr relatively thereby vary the extent' of the fuel opening.

Having thus described the nature of my said invention andthe best means I know of carrying the same into practical effect, I claim y 1. In a liquidburner, the-combination of an outer tubular inclosing-member or casing provided With an oil supply inlet port and having a cylindrically bored rear partl and a conically bored front part, a colaXially arranged inner tubular memberhaving an outwardly Haring trout part projecting into the said conically bored part and forming therewith an annular passage, a steam inlet connect-ion attached to the inner tubular member, the latter member formingl with the said cylindrically bored part an oil channel having an outlet adapted to dlscharge oil into the said annular passage, and

a cap removably attached to, the front end ot' the inner tubular member and forming therewith a nozzle comprising a` series ot' annularly disposed jet .orifices adapted to discharge steam into said passage in advance of said outlet, substantially as described.

E2. ln a liquid burner, the combination of an outer tubular mclosmg member or casing provided with an oil supply inlet port and having a cylindrically bored rear part and a con'ically bored front-part, a co-axially arranged inner tubular member having an outwardly Haring front part projecting into the said conically boredpart and forming therewith an annular passage, a steam inlet connection attached tothe inner tubular member, the 'latterfmcmber forming with the said cjf'liudrically bored part an oil channel having A,an outlet Iadapted to dis-- charge oil into the said annular passage, a cap removably attached to the front end of the inner tubular member and forming therewith a nozzle,`and means tor adjusting the. discharge from said' outlet independently of the discharge from the steam vnozzle, said nozzle comprising a series o'l annularly disposed jet orilices and adapted to discharge steam into said passage in ad.

the said cylindricallybored part an oil channel 'having an outlet adapted to discharge oil into the saidannular passage, a cap removably attached to the front end of the inner tubular member and lforming therewith a nozzle, said nozzle comprising a series of annularly disposed jet orilices and to discharge steam into said passage in ad 'ance ot' said outlet` and means for moving the inner tubular member and the cap together relatively to the said co-axially bored front part, therel adjusting the 1ischarge from the oil channel outlet, independently oi the steamn nozzle discharge, substantially as described.

4. In a liquid lucl burner, the coriibina.- tion ot' a hollow body portion having 4a fuel admission port and comprising a rear part cylimlrically bored communicating with the port and a conically bored forward mouth part with an outwardly tlaring wall` a longitudinally adjustable tubular spindle located within the said c vlindrjcall.7 bored part and connnunicating with a steam inlet port, a hollow valve ymember mounted on the forward vend ot' the tubular spindle having an out.\\'ar ,lly l'laring trout cud projecting into the conically boredpart and form! ing therewith an annular passage surrounding said flared trout end, said, valve tormingl with the forward end of the cylindrically bored part an annular tuel nozzle adapted to discharge into the rear portion ot the said annular passage,ra cap mounted on thetront end ol the valve member and having a pluralitj7 ot outwardly directed tornnng peripherally disposed jmssages with said end a series ot' steamjet outlets adapted to discharge into and across the annular passage in advance of the said fuel nozzle, and means Jor moving the valve and cap together relatively to the said body portion, substantially asdescrilied. 'Y ln testimony whereofl have signedmy name to this spccilication in the presence of two subscribing witnesses.

y ANDR-Elv LAING. \Vitnesscs 1 Jaulas \`l"'1c1is, A N nnnw Srno'r. 

